EP1604136B1 - Insertion part for inserting into a gas or liquid line - Google Patents

Abstract

An insertion part is provided in the form of a back-flow preventer and which can be inserted in a gas or liquid line. An insertion part is also provided that can be inserted into a gas or liquid line in the form of a flow regulator. The insertion parts are characterizedin that they comprise an annular lip shaped part which, togther with its annular body, is held inside the housing and which has at least one controlling lip ( 9 ), with the controlling lip being displaced by the fluid, and/or at least one sealing lip ( 14 ). The insertion part can be used in a versatile manner and is characterized by the simple production thereof as well as by having a uniform and reliable functioning.

Description

The invention relates to a built-in with a, usable in a gas or liquid line housing, in the housing interior an annular lip molding is arranged, which is held with its annular body inside the housing and provided in the region of an inflow channel and at least one, cooperating with an opposite housing wall and fluid-movable lip.

From the DE 1 154 982 a check valve is already known, which has a, usable in a gas or liquid line housing, in the housing interior at least one closing body is movably arranged, which seals in the closed position, the flow opening of an inflow channel. The closing body of the known check valve is formed as an annular circumferential and substantially tubular lip shaped part, which is held inside the housing and sealingly abuts with its, in the region of the flow opening of the inflow channel arranged lip end portion on a gripped by the closing body cylindrical housing part.

The end DE 1 154 982 Previously known sanitary fitting is designed as a check valve, the closing body is movable alone between an open and a closed position. However, the previously known from 1 154 982 built-in unit is not designed as a flow regulator, which is able to regulate the flow through the water pipe per unit time flow to a pressure-independent maximum value.

From the GB-PS 875,034 is also known only a check valve which defines a cylindrical housing interior in its housing. In this housing interior, a piston-like valve unit is slidably guided, which is movable under the pressure of the flowing water from the inlet to the provided on the opposite end face of the housing interior outlet. This piston-like valve unit has a lip shaped part which, in its rest position, closes the throughflow openings passing through the valve unit and can be moved into an open position by the water flowing in the direction of flow. In the case of a backflow of a quantity of water flowing counter to the direction of flow, the lip end region of the lip shaped part is pressed against the wall edge region delimiting the throughflow openings and counteracts a return flow of the water effectively. That too GB-PS 875,034 However, prior art built-in part is neither intended nor suitable as a flow regulator.

From the DE 1 182 487 already known for a high operating pressure check valve is known in which an annular channel between the valve housing and a centrally installed in this streamlined insert body is closed by a sleeve-shaped closure piece of elastic material. While the closure piece is moved into an open position by the water flowing through in the usual direction of flow, an amount of water flowing back in opposite to the usual flow direction presses the closure piece against the streamlined insert body in a reinforced manner, so that the annular channel remains closed.

Comparable check valves are also from the FR 2 426 199 , of the U.S. Patent 2,621,889 , of the DE 109 871 , of the FR 1 389 947 . of the DE 938 888 , of the DE 946 760 , of the DE 1 500 206 as well as the DE 37 06 737 known.

As already mentioned, however, none of the previously known non-return valves can regulate the volume flow flowing through the water line per unit time to a pressure-independent maximum value.

Flow rate regulators have also already been provided which have a conical or conical housing core in their housing interior. The housing core is encompassed by an annular throttle or regulating body of elastic material which delimits between itself and the housing core a pressure-dependent changing control gap. In the production of the known flow rate regulator, the required throttle or control body are subject to the elastic properties of the rubber material, which can lead from insert to fitting to different control properties. In addition, the known fixtures are usually designed in many parts and therefore correspondingly expensive to manufacture.

It is therefore an object to provide a versatile insert, which is characterized by a simple production and preferably also by a uniform and reliable function.

The solution according to the invention consists in the built-in part of the type mentioned in particular that the built-in part is designed as a flow regulator, the lip mold part has at least one designed as throttle or control body and oriented with its free lip end in the direction of the adjacent housing wall rule rib that the free Lips end of the shelf lip adjacent housing has a rule profiling, which by Flow-oriented orientations is formed, and that the rule lip between itself and the adjacent housing wall limits a pressure-dependent changing control gap.

The built-in part according to the invention has a housing wall which has a control profiling, which is formed by indentations oriented in the direction of flow. With the rule profiling arranged on the housing wall, a control lip provided on the lip shaped part cooperates, which limits, on the other hand, a control gap which varies in a pressure-dependent manner between its free lip end, on the one hand, and the housing profile having the standard profiling, on the other hand. In this case, the oriented towards the housing wall lip end is pressed depending on the pressure of the fluid flowing through more or less strongly in the provided on the housing and forming the rule profiling recesses, so that the limited therebetween and pressure-dependent changing control gap per unit time flowing through the flow to a constant value. Since the installation part, which can be produced with minimal outlay essentially in two parts, has a control lip and since the response of this control element is less dependent on the elastic properties of the material mixture used and on the shape and dimensions of the control lip, the built-in part according to the invention is characterized by a uniform shape Control function off.

Since the control lip is only pressed in the direction of the adjacent housing wall at a defined pressure value, the control lip at this pressure value responds with a clearly noticeable peak, which can be used as a control pulse for devices following downstream.

In this case, a particularly advantageous development according to the invention that the built-in part is also designed as backflow preventer and that the annular lip molding of the insert has at least one sealing lip which is provided as a sealingly arranged in the housing interior and in the closed position the flow-through of the inflow channel sealing closing body , Wherein the sealing lip bears in the closed position with its lip end sealingly against an opposite housing surface. The built-in part also designed as a backflow preventer has a rinförmiges lip shaped part, which is held with its ring body in the housing interior. This lip-shaped part has at least one sealing lip which can be moved by the fluid and which is moved by a return flow of the fluid in the direction of an opposite housing surface in such a way that the sealing lip abuts sealingly against this housing surface in its closed position with its lip end region. If the housing is formed in one piece, the built-in component according to the invention can be produced with little outlay essentially from two parts, namely the housing and the lip shaped part. This small number of parts favors the high reliability of the built-in part according to the invention.

In this case, a preferred embodiment according to the invention provides that a housing core is provided inside the housing, which delimits a flow opening between itself and the housing inner circumference, and that the lip molding is held with its annular body on the housing inner periphery and in the closed position with the free lips -Endbereich its sealing lip sealingly against the housing core.

It is particularly advantageous if the lip shaped part with its annular body is held on the inner circumference of the housing in order to cooperate with the free lip end of its rule lip is oriented toward the adjacent housing wall of a housing core.

A development according to the invention of its own worth-worth-worth, which summarizes the function of a flow regulator and a backflow preventer in a built-in part, provides that the lip molding has at least one inflow-side control or control lip and at least one downstream sealing lip.

In order to achieve a sensitive and largely material-independent response of the flow rate regulator according to the invention, it is advantageous if the rule lip with its free lip end region in one of the flow direction of the fluid opposite direction, and limited between itself and the housing inner circumference an inflow open annulus. In this inflow-open, blind hole-like annular space, the inflowing fluid strikes the control lip in such a way that it is pressed in a pressure-dependent manner relative to the housing core and alters the control gap which limits and regulates the flow rate.

In this case, a sensitive response of at least serving as a flow regulator insert is favored when the over the Wandungsumfang the adjacent housing preferably uniformly distributed indentations are circular arc or the like rounded.

In contrast, the sealing lip of at least serving as a backflow preventer insert can be oriented in the radial direction and cooperate in the closed position with an annular flange on the housing core. However, an embodiment in which the sealing lip is oriented with its free lip end region in the direction of flow is preferred. Such a sealing lip oriented in the flow-through direction can also be sealingly applied to a cylindrical or conical or conical housing core in the case of an undesirable reverse flow.

It is expedient if the housing wall adjacent to the free lip end has a groove-forming or deformation-free wall section in its area acted on by the sealing lip.

While the housing is optionally made with its housing core preferably made of a suitable dimensionally stable metal or in particular a plastic material, sees a preferred embodiment according to the invention, that the lip molding is made of an elastic rubber or plastic material.

Although the response pressure and the response of the control or sealing lips, for example, be influenced and determined solely by the Shore hardness of the rubber-elastic material, but preferred is an embodiment in which the response pressure and the response of the control lip and / or the sealing lip by the length , the thickness or the like shape and dimensions of the lip (s) and / or by the material properties of the lip molding are predetermined.

The lip molding can be inserted and held, for example, in a groove which is provided on the inner circumference of the optionally also one-piece housing. However, an embodiment in which the housing of the mounting part is formed at least in two parts and the annular lip molding is held with its annular body between two adjacent housing parts is preferred.

It may be expedient if the annular body of the lip shaped part is designed as a housing part seal for the adjacent housing parts.

In order to optimize the provided with respect to flow control and backflow prevention functions of the insert according to the invention may still be advantageous if on the control body of the lip molding on both sides at least one regulating and / or sealing lip is provided, and if these control and / or sealing lips in the area an associated flow opening or in the region of a control gap are arranged.

In this case, a development according to the invention, is claimed for the independent protection, that on the control body of the preferably substantially star- or x-shaped lip molding on both sides in each case a rule lip and a sealing lip is provided and that provided on opposite sides of the control body lips each associated with a control gap with downstream flow opening. Such a star-shaped or X-shaped lip shaped part can for example be glued, welded or the like attached to the downstream end face of a housing annular wall which is arranged approximately centrally in the interior of the housing. Also, this component can be made essentially of two components, namely the housing and the associated lip molding.

In order to give the lip molding in the fitting a firm and secure grip, it is advantageous if the annular body of the lip molding is fixed between the inflow-side and the outflow-side housing part in a housing chamber. In this case, a preferred embodiment according to the invention provides that the housing chamber is formed closed except for an annular gap and that the annular gap passes through a connecting web of the lip molding, which connects the annular body with the control and / or the sealing lips.

The low production costs for the insert according to the invention is additionally reduced if the adjacent to the lip mold part housing parts are locked together. For the same reason, it is expedient if the housing core, which preferably tapers conically or conically in the direction of flow, has a particular inflow side Housing part is integrally connected via an at least radial connecting web.

Additional embodiments of the invention are set forth in the further subclaims. The invention with its essential details with reference to the drawings is explained in more detail below.

Fig. 1

ein als Durchflussmengenregler ausgebildetes und hier längs geschnittenes Einbauteil mit einem ringförmigen Lippenformteil, dessen Regellippe mit einem ebenfalls im Gehäuseinneren befindlichen kegel- oder konusförmigen zentralen Gehäusekern zusammenwirkt,

Fig. 2

ein ebenfalls in einem Längsschnitt dargestelltes Einbauteil, ähnlich dem aus Fig.1, das sowohl als Durchflussmengenregler als auch als Rückflussverhinderer ausgebildet ist und dessen Lippenformteil dazu eine abströmseitige Dichtlippe hat,

Fig. 3

einen mit Fig.1 vergleichbaren Durchflussmengenregler bei steigenden Druckverhältnissen in Längsschnitten (vgl. Fig.3a, 3c, 3e) und Querschnitten (vgl. Fig.3b, 3d, 3f) und

Fig. 4

unterschiedliche und an das gewünschte Ansprechverhalten angepasste Ausführungen eines Einbauteiles nebst den diesen Ausführungen zugeordneten Leistungsdiagrammen.

It shows:

Fig. 1

a trained as a flow regulator and here longitudinal cut fixture with an annular lip shaped part, the control lip cooperates with a likewise located inside the cone or cone-shaped central housing core,

Fig. 2

a likewise shown in a longitudinal section fitting, similar to that Fig.1 , which is designed both as a flow regulator and as a backflow preventer and whose lip mold part has a downstream sealing lip,

Fig. 3

one with Fig.1 comparable flow rate regulator with increasing pressure ratios in longitudinal sections (cf. 3a, 3c, 3e ) and cross sections (cf. Fig.3b, 3d, 3f ) and

Fig. 4

different and adapted to the desired response versions of a built-in part together with the power diagrams associated with these designs.

In the FIGS. 1 and 2 are built-in parts 1, 100 shown, which are used at least as a flow regulator in a gas or a liquid line. The built-in parts 1, 100 have a housing 2, on the housing inner circumference of an annular lip molding 3 is held.

Like from the Fig.1 and 2 becomes clear, the housing 2 is designed in two parts and has an inflow-side and a downstream-side housing part 4, 5. The lip shaped part 3 is fixed with its ring body 6 in a housing chamber 7 between the inflow-side and the outflow-side housing part 4, 5. This housing chamber 7 is formed closed except for an annular gap. The annular gap is penetrated by a connecting web 8 of the lip shaped part 3, which connects the annular body 6 to a circumferential control lip 9.

The control lip 9 is configured as a throttle or control body, which defines a pressure-dependent changed control gap between itself and a central housing core 10.

As in the FIGS. 1 and 2 is shown, the control lip 9 with its free lip end in one of the flow direction Pf1 of the fluid opposite direction and limited between itself and the housing inner circumference an inflow-open, blind hole-like annulus 11. After reaching a predetermined pressure of the line through and thus by the built-in part 1, 100 flowing fluid, the control rib 9 is pressed depending on the pressure in the direction of the housing core 10 that narrows the control gap. As a result of this pressure-dependent movement of the control lip 9 and the resulting constriction of the control gap, the quantity of fluid flowing through per unit time also becomes constant, even under strong pressure fluctuations regulated, with the flow rate in the specified tolerance moves.

The housing core 10 is designed conical or conical and tapers uniformly in the flow direction Pf1. The housing core 10, which is integrally connected to the housing part 4 via radial webs 12 oriented in the direction of flow, has at its outer circumference - as well as in the in Fig.3b, 3d and 3f shown cross-sections is clearly - elipsoid, polygonal - or as here - arcuate recesses 13, which form in the flow direction and circumferentially open flow channels. These recesses 13 are distributed uniformly over the circumference of the housing core 10.

This in Fig.2 Built-in part 100 shown is additionally designed as a backflow preventer. For this purpose, it has on the connecting web 8 of its lip-shaped part on the downstream side of the control lip 9 arranged sealing lip 14 which is movable by the fluid and oriented with its free lip end in the flow direction Pf1. This sealing lip 14 is formed as a closing body which seals in the closed position the limited between the housing core 10 and the housing inner periphery flow-through. In the case of an undesirable return flow of the fluid counter to the flow direction Pf1, the sealing lip is pressed in the direction of the housing core 10 in such a way that it bears sealingly against the opposite housing surface of the housing core 10 with its free lip end region. The housing core 10 has in its acted upon by the sealing lip 14 area a groove or indentation core section.

In the 4b, 4d and 4f are the flow rates per unit time as a function of the pressure of the fluid shown in different embodiments of the lip molding. The associated. designed as a flow regulator built-in parts 1 with their different lip moldings 3 are in the 3a, 3c and 3e shown in a cross section. As if from a comparison of FIGS. 4a to 4f becomes clear, the response pressure and the response of the lips 9, 14 and in particular the control lip 9 by the length, thickness or the like shape and dimensions of the lip 9, 14 as well as by the Shore hardness and the like material properties of the lip molding 3 can be predetermined ,

It is a particular advantage of the flow rate regulator 1, 100 shown here that their response depends less on the material properties of the rubber-elastic throttle or control body 9 as much as on its shape and dimensions.

As in the 3a and 3b is shown, the control lip 9 is hardly changed at low pressures. In the 3c and 3d It can be seen that the control lip 9 reacts quickly at slightly increasing water pressures and is pressed in the direction of the housing core 10. This pressure-dependent movement of the control lip 9 is in the Figures 4b, 4d and 4f recognizable as a clear peak in the course of the curve. This peak, which is more or less clear depending on the design of the control lip 9, can be used as a control pulse to start, for example, a water heater.

In the 3e and 3f is indicated that the rule lip 9 is pressed with increasing water pressure in the recesses 13 of the housing core 10, wherein now a maximum flow rate per unit time is not exceeded.

The rule lip 9 of in 4a built-in parts 1 shown is designed for a low pressure range of 0.2 to 3.0 bar and liquid quantities of 1 to 8 l / min. The free lip end region is designed to be thin and arranged in the vicinity of the housing core 10 in the idle state.

The rule lip 9 of in 4c and 4d Installation parts 1 shown is designed for high pressure values of 1 to 10 bar and flow rates of 1 to 2 l / min. The free lip end region is formed comparatively thick and arranged further away from the housing core. It is therefore a higher pressure required to press this rule lip 9 in the recesses 13 of the housing core 10.

In FIG.4E is a fitting 1 shown, which has a very thin and comparatively long control lip 9, which extends with its free lip end portion to close to the housing core 10. The built-in part 1 according to FIG.4E is intended for low viscosity fluids or low density fluids such as air or other gases and designed for low pressure ranges and high flow rates per unit time of about 80 l / min. This built-in part can also be used in applications in which conventional flow rate regulator with an O-ring-shaped throttle or control body can not be used. In this case, the response pressure and the response in contrast to conventional flow rate regulators by a corresponding geometry and choice of material of the lip mold part 3 and its rule lip 9 in both areas can be varied. The set pressure of such a built-in part can also be designed with appropriate geometric design of its control lip 9, that the set pressure, for example, is already at 0.2 bar.

The built-in parts 1, 100 shown here are versatile and are characterized by a simple production and a uniform and reliable function.

Claims (20)

1. Insertion part (1, 100) having a housing (2) adapted to be inserted in a gas or liquid pipe, while inside the housing is arranged an annular lip moulding (3) which is held with its annular member (6) inside the housing and is provided in the region of an inflow channel and has at least one lip (9) that cooperates with an opposing housing wall and is movable by the fluid, characterised in that the insertion part (1, 100) is constructed as a flow regulator, the lip moulding of which comprises at least one regulating lip (9) constructed as a throttling or regulating member and oriented with its free lip end towards the adjacent housing wall, in that the housing wall adjacent to the free lip end of the regulating lip (9) has a regulating profile which is formed by indentations (13) oriented in the direction of throughflow (Pf 1), and in that the regulating lip (9) defines, between itself and the adjacent housing wall, a regulating slot that varies depending on the pressure.
2. Insertion part (100) according to claim 1, characterised in that the insertion part (100) is simultaneously also formed as a reflux inhibitor and in that the annular lip moulding (3) of the insertion part (100) has at least one sealing lip (14) which is provided as a closure member disposed to be movable inside the housing and closing off the throughflow opening of the inflow channel in the closed position, the sealing lip (14) in the closed position abutting on an opposing housing surface with its lip end region so as to form a seal.
3. Insertion part according to claim 1 or 2, characterised in that inside the housing is provided a housing core (10) which defines between itself and the inner periphery of the housing a throughflow opening, and in that the lip moulding (3) is held with its annular member (6) on the inner periphery of the housing and in the closed position abuts on the housing core (10) with the free lip end region so as to form a seal.
4. Insertion part (1, 100) according to claim 3, characterised in that the lip moulding (3) is held with its annular member (6) on the inner periphery of the housing and is oriented, with the free lip end of its regulating lip (9), towards the adjacent housing wall of a housing core (10).
5. Insertion part according to one of claims 1 to 4, characterised in that the lip moulding (3) has at least one regulating lip (9) on the inflow side and at least one sealing lip (14) on the outflow side.
6. Insertion part according to one of claims 1 to 5, characterised in that the at least one regulating lip (9) points with its free lip end region in a direction opposite to the direction of throughflow (Pf1) of the fluid and defines between itself and the inner periphery of the housing an annular space (11) which is open on the inflow side.
7. Insertion part according to one of claims 1 to 6, characterised in that the indentations (13) are in the form of throughflow channels that are open towards the circumference of the housing core.
8. Insertion part according to one of claims 1 to 7, characterised in that the indentations (13) arranged at preferably regular intervals around the circumference of the housing wall are ellipsoid, polygonal, arcuate or the like.
9. Insertion part according to one of claims 1 to 8, characterised in that the sealing lip (14) is oriented with its free lip end region in the direction of throughflow (Pf1).
10. Insertion part according to one of claims 1 to 9, characterised in that the housing wall has a core portion that is free from grooves or indentations in its region that is contacted by the sealing lip (14).
11. Insertion part according to one of claims 1 to 10, characterised in that the lip moulding (3) is made from an elastic rubber or plastics material.
12. Insertion part according to one of claims 1 to 11, characterised in that the response pressure and the response characteristics of the regulating lip (9) and/or of the sealing lip (14) are predetermined by the length, thickness or other shape and dimensions of the lip(s) (9, 14) and/or by the material properties of the lip moulding (3).
13. Insertion part according to one of claims 1 to 12, characterised in that the housing (2) of the insertion part (1, 100) is constructed in at least two parts and the annular lip moulding (3) is held with its annular member (6) between two adjacent housing parts (4, 5).
14. Insertion part according to one of claims 1 to 13, characterised in that the annular member (6) of the lip moulding (3) is constructed as a housing part seal for the adjacent housing parts (4, 5).
15. Insertion part according to one of claims 1 to 14, characterised in that at least one regulating and/or sealing lip (9, 14) is provided on each side on the annular member (6) of the lip moulding (3) and in that these regulating and/or sealing lips (9, 14) are arranged in the region of an associated throughflow opening or in the region of a regulating slot.
16. Insertion part according to claim 15, characterised in that a regulating lip (9) and a sealing lip (14) are provided on each side on the annular member (6) of the preferably substantially star-shaped or x-shaped lip moulding (3) and in that the lips (9, 14) provided on opposite sides of the annular member (6) are each associated with a regulating slot having at least one throughflow opening on the outflow side.
17. Insertion part according to one of claims 1 to 16, characterised in that the annular member (6) of the lip moulding (3) is secured between the housing part on the inflow side and the housing part on the outflow side (4, 5) in a housing chamber (7).
18. Insertion part according to claim 17, characterised in that the housing chamber (7) is of closed construction, apart from an annular slot, and in that the annular slot is penetrated by a connecting web (8) of the lip moulding (3) which connects the annular member (6) thereof with the regulating and/or sealing lips (9, 14).
19. Insertion part according to one of claims 1 to 18, characterised in that the housing parts (4, 5) adjacent to the lip moulding (3) can be latched to one another.
20. Insertion part according to one of claims 2 to 19, characterised in that the housing core (10) which preferably tapers in a conical shape in the direction of throughflow (Pf1) is integrally connected to a housing part (4) on the inflow side, in particular, by means of at least one radial connecting web (12).

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